Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"population estimation"”.
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Spatial Behavior and Population Estimation of the Alligator Snapping Turtle (Macrochelys Temminckii)
… freshwater turtle species in North America. Populations have been subjected to over a century of commercial and recreational harvest, causing large scale population declines. Additionally, their aquatic habitat has been subjected to largescale anthropogenic degradation. Very few robust …
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DNA-based Population Estimation, Harvest Vulnerability, and Home Range Dynamics of Black Bears in Western Maryland
… tool. Having a better understanding of bear population parameters, movements, and harvest vulnerability allows managers to implement hunting more effectively and responsibly. To estimate demographics of the Maryland bear population, we implemented noninvasive genetic sampling of bear hair …
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Population Estimation Procedures For Elk and Deer in the Black Hills, South Dakota: Development of a Sightability Model and Spotlight Survey
… for evaluating temporal changes in estimated population parameters. However, visibility bias can cause serious underestimates of total counts when conducting aerial surveys for ungulates. The Black Hills of South Dakota are characterized by dense ponderosa pine (Pinus ponderosa), which affects …
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Evaluating the Effectiveness of Population Reconstruction for Black Bear (Ursus americanus) and White-Tailed Deer (Odocoileus virginianus) Population Management
This study was a comprehensive evaluation of population reconstruction techniques. Population reconstruction techniques are population estimation methods that calculate a minimum population size based on age-specific harvest data (Downing 1980, Roseberry and Woolf 1991). Population reconstruction …
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Probabilistic Models for Human Migration Forecasting and Residency Imputation
I develop probabilistic models to enhance the estimation and forecasting of human migration flows and residency. Using a Bayesian hierarchical approach, I first propose a model for forecasting global bilateral migration flows among the 200 most populous countries, producing well-calibrated …
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The estimation of populations of some farm game species
… investigation was concerned primarily with the estimation of fish, rabbit, and squirrel populations on various areas on the Virginia Polytechnic Institute College Farms at Blacksburg, Virginia. Particular attention was given to the capture-recapture method and other related methods of population …
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Intertidal mudflats and the conservation of migratory shorebirds
… habitat availability, its influence on shorebird populations and how to prioritise conservation efforts is critical to inform conservation interventions. In this thesis, I integrate remote-sensing, local shorebird population surveys, high-resolution shorebird tracking, citizen science bird count …
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Space Use And Habitat Selection By Bobcats In Southeastern Kentucky
<p>Population estimation and trend analyses are critically important for sustainable harvest and management of many species. The bobcat (Lynx rufus) plays important ecological and economic roles in Kentucky as a furbearer and mesopredator. I conducted a study of the bobcat in southeastern Kentucky …
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Cheetah of the Serengeti Plains: A home range analysis
… under continued conservation threat in small populations mostly in protected areas in an historically reduced geographic range. Home range, a useful trait for threat assessment, species reintroduction, and population estimation, is plastic in cheetah with sizes ranging from 40 km2 to over 1000 …
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Estimating spotted hyaena (Crocuta crocuta) population density using camera trap data in a spatially-explicit capture-recapture framework
Species-specific population data are important for the effective management and conservation of wildlife populations within protected areas. However such data are often logistically difficult and expensive to attain for species that are rare and have large ranges. Camera trap surveys provide a …
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The Relative Contribution of Hudson River Tributaries to River Herring Spawning Dynamics
… the range of uncertainty as it pertains to the estimation and application of these aforementioned contributors, however, hierarchical modeling, spatio-temporal visualization, and the cross validation of estimation methods provides a suitable means for addressing this uncertainty and the …
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Habitat associations and abundance of Eastern Black Rails (Laterallus jamaicensis jamaicensis) in southeastern Colorado
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Substrate Utilization of the Emerging Fungal Pathogen, Candida auris, and the Antifungal Activity of Select Essential Oils
… are three-fold. First, two existing methods, population estimation using absorbance-based standard curves and methylene blue viability staining, were investigated as to application in determining <em>Candida auris</em> cell population size and viability, respectively. Both the …
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An evaluation of some rabbit management procedures as applied in southeastern Virginia
… practices. An attempt was made to test three population estimation formulae on a known, enclosed rabbit population. Results of trapping within the five acre enclosure gave a comparable population estimate fer the Lincoln index, the Krumholz formula and the Schumacher-Eschmeyer formula. This …
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Evaluation of intensified rabbit management procedures on public hunting area in southcentral Virginia
… of Game and Inland Fisheries. Cottontail Rabbit population fluctuations were measured by roadside counts during the summer months. It was found that a precipitous drop in the rabbit population occurred in mid-August. The suspected etiology of this population drop was disease, although no research …
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EVALUATION AND APPLICATION OF POPULATION SIZE ESTIMATORS TO ASSESS BROOK TROUT (SALVELINUS FONTINALIS) RESPONSE TO A NON-NATIVE SALMONID REMOVAL IN A SMALL MICHIGAN COLDWATER STREAM
… Great Lakes since the 1870s and now naturalized populations use tributary environments to reproduce and for their juvenile life stage. Historically, brook trout were the only salmonid to inhabit the tributary environment and numerous studies suggest that exotic salmonids negatively affect brook …
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Population abundance and genetic structure of black bears in coastal North Carolina and Virginia using noninvasive genetic techniques
… for apparently high-density, growing black bear populations in the Roanoke-Neuse-Tar-Cape Fear ecosystem in coastal North Carolina and Virginia. In order to provide the scientific information necessary to develop these strategies, I investigated population densities and genetic structure of black …
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Breeding success, prey use, and mark-resight estimation of burrowing owls nesting on black-tailed prairie dog towns: plague affects a non-susceptible raptor
… success, and used mark-resight methods for owl population estimation. Prairie dogs experience high mortality from plague, and their colonies are periodically extirpated by outbreaks. Plague does not make owls sick, but they may be affected as unmaintained burrows collapse, vegetation grows …
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Monarch Butterfly (Danaus plexippus) Tree Preference and Intersite Movement at California Overwintering Sites
… Also, in years when the overwintering population was highest, monarchs clustered disproportionately on native conifers, and they often switched from clustering on eucalyptus in the early winter to native conifers in the middle or late winter. Our results suggest that overwintering …
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Population Pharmacokinetics of Therapeutic Monoclonal Antibodies: Examples and Estimation Method Performance Differences
… clinical drug development of therapeutic mAbs is population PK, which attempts to quantify the typical disposition characteristics and sources of PK variability (such as between-subject, within-subject, and inter-occasion variability) within study populations. Population PK also attempts to …